Hardness
Moderately Hard
114.5 PPM · 6.7 GPG
Local water dashboard
Official source aggregationWater quality in Show Low, AZ 85901
A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Navajo County.
3 active health-based violations
- Primary matched system
- City Of Show Low
- Source water
- Groundwater
- County
- Navajo County
- Profile updated
At a glance
What the current records say
EPA quarter 2026Q2
Compliance screen
Review needed
3 active health-based records
Lead 90th percentile
0 mg/L
0% of action level
Utility match
10 systems
Serves 17,139 people system-wide
Hardness meter
How hard is the water?
Estimated local hardness
USGS hardness classification scale
114.5 PPM
Soft
0–59Moderate
60–120Hard
121–180Very hard
181+
0–59Moderate
60–120Hard
121–180Very hard
181+
Parts per million
114.5
mg/L as CaCO₃ equivalent
Grains per gallon
6.7
1 GPG ≈ 17.1 PPM
What this means at home
At 114.5 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.
USGS sites used
14
Nearest site
3.3 mi
Observation range
Jul 12, 2017–Jun 17, 2020
Estimate confidence
Moderate
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: A-11-22 15ADB (Well).USGS source documentation ↗
Regional context
Is 85901 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Show Low median
115 PPM
About the same1 indexed ZIP readings · Range 114.5–114.5 PPM
Arizona median
241 PPM
126 PPM lower285 indexed ZIP readings · Range 66.4–1250 PPM
EPA benchmark screen
Contaminant snapshot
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
1 pass1 fail
Lead (PB90)
0 mg/L
Reported Dec 31, 2025
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
2 comparable results
Missing values remain blank; absence is not treated as a pass.
Lead (90th percentile)
Measured in mg/L
Local 0
EPA limit 0.015
Selenium
Measured in MG/L
Local 0.34
EPA limit 0.05
Share of EPA benchmark
100% line = listed limit
2026Q2
- All records
- 130
- Health-based
- 34
- Active health-based
- 3
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Revised Total Coliform Rule | AZ0409091 | Resolved | Feb 1, 2026through Feb 2, 2026 |
| SeleniumHealth-basedReported 0.34 MG/L · MCL 0.05 | AZ0409040 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Lead and Copper Rule | AZ0409091 | Unaddressed | Jan 1, 2026 |
| Lead and Copper Rule | AZ0401372 | Resolved | Jan 1, 2026through Mar 16, 2026 |
| Public Notice | AZ0409300 | Resolved | Nov 19, 2025through Dec 26, 2025 |
| Revised Total Coliform Rule | AZ0409091 | Resolved | Nov 1, 2025through Nov 30, 2025 |
| Consumer Confidence Rule | AZ0409311 | Unaddressed | Oct 2, 2025 |
| Consumer Confidence Rule | AZ0409300 | Unaddressed | Oct 2, 2025 |
| SeleniumHealth-basedReported 0.34 MG/L · MCL 0.05 | AZ0409040 | Archived | Oct 1, 2025through Dec 31, 2025 |
| Revised Total Coliform Rule | AZ0409091 | Resolved | Sep 1, 2025through Sep 30, 2025 |
| LEAD AND COPPER RULE REVISIONS | AZ0409000 | Resolved | Jul 2, 2025through Dec 29, 2025 |
| Consumer Confidence Rule | AZ0409311 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | AZ0409300 | Unaddressed | Jul 1, 2025 |
| SeleniumHealth-basedReported 0.33 MG/L · MCL 0.05 | AZ0409040 | Archived | Jul 1, 2025through Sep 30, 2025 |
| Consumer Confidence Rule | AZ0409000 | Resolved | Jul 1, 2025through Oct 20, 2025 |
| Consumer Confidence Rule | AZ0409091 | Resolved | Jul 1, 2025through Oct 17, 2025 |
| SeleniumHealth-basedReported 0.33 MG/L · MCL 0.05 | AZ0409040 | Archived | Apr 1, 2025through Jun 30, 2025 |
| Lead and Copper Rule | AZ0409330 | Resolved | Jan 1, 2025through Nov 5, 2025 |
| Lead and Copper Rule | AZ0409300 | Unaddressed | Jan 1, 2025 |
| SeleniumHealth-basedReported 0.24 MG/L · MCL 0.05 | AZ0409040 | Archived | Jan 1, 2025through Mar 31, 2025 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Your personalized water action plan
Matched to Show Low ZIP 85901 using 114.5 PPM nearby hardness and 2 reported measurement benchmarks.
Drinking water protection
Under-Sink Reverse Osmosis System
Selenium has a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
Explore under-sink filtrationAffiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
Frequently asked
Water questions for Show Low
Is tap water safe in Show Low?+
EPA ECHO reports 3 active health-based violations among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
How hard is the water?+
Nearby USGS observations produce an estimate of 114.5 PPM, or 6.7 grains per gallon, classified as moderately hard. This is not a household tap measurement.
Do I need a water softener?+
There is no high-hardness trigger in this profile. Confirm with a tap test before buying equipment.